Only some of this is about Jeremy Clarkson

Try to forget one man and his silly comments.

This was going to be a post about Jeremy Clarkson. About how I like Clarkson: as right-wing writers go, he's rather good. (He's no PJ O'Rourke, no matter how desperately hard he tries, but he makes me chuckle. I hereby ask for my "The Left" membership card to be rescinded immediately.)

This isn't a case of: "First they came for the Clarksons, and I didn't speak up because I wasn't a jowly denim-clad petrolhead oaf roaring half-baked grandstanding silliness to needle-dicked losers who like cars." This is just a silly man saying silly things, exaggerating them to make them sound sillier.

Wouldn't you know it, he's got a book out as well; I'm sure this entirely coincidental controversy might shift a few units. The more people get outraged, the more of them will probably be sold, and the more money he'll make. See how Clarkson nourishes himself by licking your salt tears of outrage; see how your hate has made him powerful.

I was going to expand on all of that, but then I saw the news, and Clarkson's comments being the lead item on the news, and it depressed me entirely. Thousands upon thousands of people all over the country got together yesterday to battle against the Government, yet because one person says some tedious trolling deliberately controversial load of old guff to flog a few books, that's shifted the entire focus of public debate. Doesn't that depress you?

This suits The Right (well, if they can use capitals and huge overgeneralisations, I don't see why I can't, so I'm using "The Right" to mean "everyone I don't like, from Ronald Reagan to Ronald McDonald, tainting everyone with the actions of the people I dislike the most") very well indeed. They might like to make the feeble suggestion that 30 November was a damp squib, but it wasn't -- it was popular, powerful and impressive.

I was out there on the picket lines, seeing the numbers at rallies and hearing about the passionate reasons why moderate workers had decided to take action. It wasn't because some nasty spectral bully in charge of their union had forced them into it; it was because they were fed up with what had been handed out to them, and why the public sector had been scapegoated and picked on by the Coalition to pay extra pensions that wouldn't even go into their pension pots.

These people weren't the usual leftie troublemakers stirring up disaffected workers; these were hardworking taxpayers who'd had enough of being squeezed dry.

These were men and women who simply did not buy the Government's line that we were all going to have to do our bit in these troubled times -- and I heard time and time again the comparison made between the pensions of those who had caused this crisis, those MPs who had failed their country, and those who were now being targeted as having 'gold-plated' futures. People aren't buying the Coalition's line, and that should be of real concern to them; it's not just the strikers and their natural sympathisers who have worked that out, either.

I had written, before 30 November, that the strikes risked drawing a wedge between similarly badly-treated groups of private and public sector workers unless they could appeal to as broad a range of people as possible. Looking at it now, I don't think those fears were justified. I heard many speakers and union members talking about the need to make private sector pensions fairer, the need for private and public sector workers to unite against the common enemy in Government, and the desire to ensure this didn't become a conflict between groups of employees.

Let's focus on that. Let's focus on the success of 30 November, and what it means for the future. The public don't trust the Government, despite the cheerleading for the Tory agenda and the hissing at the strikers from the usual sections of the press. Striking might upset some, but it has the support of many. Forget one man and his silly comments -- the debate about Clarkson is just what the Government would like to happen, to draw attention away from their miserably poor attempts to demonise strikers.

Don't let them get away with it. Otherwise, you should be taken outside and shot in front of your kids.

 

 

Patrolling the murkier waters of the mainstream media
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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.